<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .container{
            width: 200px;
            height: 200px;
            background-color: skyblue;
        }
        .container:hover{
            /* 30deg 表示旋转30度 */
            transform: rotate(30deg);
        }
    </style>
</head>
<body>
    <div class="container">
        wertyuiop
    </div>
</body>
</html>